Multiple punch



Feb. 2%, T1952 A. LO. MARSH 2,587,185

MULTIPLE PUNCH Filed Sept. 17, 1946 Patented Feb. 26, 1952 UNITED STATESPATENT OFFICE MULTIPLE PUNCH H Allan 0. Marsh, Los Angeles,-Calif.Application September 17, 1946, Serial No. 697,504

1 Claim. (o1. 1s4-91) This invention relates to paper punches, and moreparticularly to an improved actuating mechanism for actuating the punchrods employed therein. I

. While there have hitherto been proposed multiple punches of a typeoperating off a gang operating rod by engagement of a member in a slotformed in the rod, the punches of this type have not been entirelysatisfactory inasmuch as they have employed a milled notch milled in oneside of the engaging punch rod. This milled notch has caused the punchrods to bind with the operating rod in the event of any rotation ordisplacement of the punch rod. Furthermore, the milling of the notchesis an expensive operation.

It is therefore one object of this invention to provide a multiple punchof the type described employing an improved actuating mechanism.

It is a further object of this invention to provide an actuatingmechanism for a multiple punch employing turned recesses on the punchrods providing an engaging shoulder for cooperating with the gangoperating rod.

It is a further object of this invention to provide a multiple punch ofthe type described which, by reason of the annular groove in theactuating head, avoids binding thereof in the event said head becomestwisted.

Further objects and advantages appear from the annexed specification inwhich:

Figure 1 is a perspective view of a device embodying the invention; and

,Figure 2 is a section taken on the line 2-2 of Figure 1.

Referring more particularly to the drawings, there is shown a multiplepunch including a base I and a plurality of punch heads 2. The heads 2are mounted within a slide recess l3 in the base I and are held in theiradjusted position by means of knurled bolts I4 and nuts 18 acting toclamp a shoulder l5 formed on the heads 2 to the base I. The nuts l8 arehexagonal in form and are prevented from rotating by the depending ribsIS in the lower side of the base. Within the punch heads 2 are slidablymounted punch rods 3 yieldably urged toward retracted position by meansof springs 4. The springs 4 are seated in the bottom of a bore 20 formedwithin the punch heads 2, and the upper ends of the springs resilientlypress against the lower edge of a shoulder II. The shoulder H forms abearing section slidably engaging the walls of the bore 20 and servingto aline the punch rod 3. Another bearing section I2 is formed at theupper end of the punch rod as indicated. A gang operating rod 5 isjournaled in the respective heads 2 and provided with an operatinghandle 6. The operating rod 5 is formed with a milled groove 7 formingan actuating shoulder adapted to engage the operating shoulder 9 formedon the punch rods 3 as hereinafter described.

In forming the completed punch rod 3, the rod 3 is placed in a suitablemachine tool and the section I9 is turned therein to provide clearancefor the rod 5. The rod 3 is also turned as at Ill to provide thecompletely annular operating shoulder 9. In order to hold the papersquare within the paper receiving slots l6 of the heads 2, an adjustablepaper guide I! may be provided which is supported on the base I inadvance of the punches 2 as indicated.

Heretofore it has been the practice in constructing this type ofmultiple punch to mill a shoulder somewhat similar to the shoulder 9transversely of one edge of the rod 3. The result has been that, if thepunch rod 3 is twisted in the head 2, it will jam the shoulder againstthe operating rod 5 either destroying the shoulder or jamming the punch.By turning the rods 3 as is contemplated in this invention, not only isan expensive milling operation avoided, but a completely annularshoulder as well as the completely annular turned portions l0 and H] areprovided with the result that no matter how the punch rods 3 may twistin the machine, it is impossible for the shoulder to jam in the groove 1formed in the gang operating rod 5.

It should be carefully observed that the longitudinally' extendinggrooved portion 1 is triangularly shaped with the apex 7A of suchgrooved portion lying substantially on the longitudinal axis of theoperating rod 5, and that such grooved portion is defined by thenormally upwardly inclined plane face 1B and downwardly extending face1C. Likewise, it should be carefully observed that the upper face 9A ofthe annular shoulder 9 lies on a horizontal plane with the peripheraledge of such surface 9A normally engaging the plane face 'lB on a linecontact. This line contact provided between the face 13 and the upperedge of the annular shoulder 9 is of importance in that, as aconsequence thereof, the punch rod 3 is relatively free to turn aboutits own axis when and as it is moved downwardly upon rotation of theoperating rod 5 about its axis, which axis corresponds substantially tothe apex of the triangularly shaped grooved portion 1.

While there has been described what is at present considered a preferredembodiment of the invention, it will be understood that various changesand modifications may be made therein without departing from the essenceof the invention that is intended to cover herein all such changes andmodifications as come within the true scope and spirit of the appendedclaim.

I claim:

In a punch construction of the character described, an -operating'rodhavingan actuating handle, a triangularly shaped longitudinallyextending grooved portion in said rod, a punch head, said punch headhaving a bore ,there through, a punch rod mounted in said borefsaidpunch rod having formed thereonfa ,pair of spaced shoulders, said spacedshoulders being spaced by two converging conical sections, a springrecessed within said head and having ;one of its ends abutting said headand the other one of itsends abutting one of saidishoulders, saidgrooved portion cooperating with the other one ofsaid shoulders in'allanfgularjpositibns of said rod and encompassingjthe j'same fto,con'fine "said other shoulder within said fg' roovedjp'ortion, said rodbeing journaled in Isalid punch head, the

4 upper surface of said other annular shoulder being in a horizontalplane and having its peripheral edge in line contact with an upwardlyinclined plane face of said triangularly shaped grooved portion,actuation of said handle resulting in rotation of said rod about itsaxis, whereby due to said line contact, the punch rod is relatively freeto rotate about its axis simultaneously with its resulting longitudinalmovement.

ALL N =0. MARSH.

REFERENCES CITED ,"The following references are of record in the-fi1e-of this patent:

UNITED STATES PATENTS Number Name Date Re.*1 3,"3-1"3 Whitney Nov. 4,1911 949,807 Nymon Feb. 22, 1910 1,150,179 Dom Aug. 17, 1915 1,243,656Cobb Oct. 16, .1917 113491661 Buhl Aug.'17,j'1920 1,475,828 Holm'es Nov.27,1923 2,102,292 St. Louis et a1. Dec. 14,1937 2,149,268 Brennan 'Mar.7,1939 2,482,218 'segal Sept. 20, I949

